VMware vSphere 4 Installation Guide Page 38

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Table 5-1. Upgrading vCenter Server Components (Continued)
Product Component Description
VirtualCenter Server 2.5 Upgrade
vCenter Server 4.0 Install
Oracle database Verify that your database is supported. Upgrade if necessary.
Oracle 9i is no longer supported.
SQL database Verify that your database is supported. Upgrade if necessary.
Microsoft SQL Server 2000 is no longer supported.
Linked Mode Cannot join a Linked Mode group during the upgrade procedure.
Join after the upgrade to vCenter Server is complete.
License server License server To manage ESX 3.x/ESXi 3.5 hosts, verify that the vCenter Server
system is configured to use a license server. Install a license server
if necessary.
ESX ESX 2.5 host Supported with vCenter Server 4.0, but cannot add the hosts to
clusters.
VMFS2 volumes Supported as read-only (deprecated)
ESX2 virtual machines Support for ESX 2 virtual machines (virtual hardware version 3)
starts with ESX 2. Support continues through ESX 4.0. Upgrade is
optional, but strongly recommended.
VMDK2 virtual disk The file layout introduced with ESX 2. Support continues through
ESX 4.0. This is a single file with meta-data at the end.
ESX MUI No change
VMware Tools Upgrade (optional)
ESX 3.x/ESXi 3.5 host Upgrade to ESX 4.0 (optional)
VMFS3 volumes No change
ESX3 virtual machines Support for ESX 3 virtual machines (virtual hardware version 4)
starts with ESX 3. Support continues through ESX 4.0. Upgrade is
optional.
VMDK3 virtual disk The file layout introduced with ESX 3. Support continues through
ESX 4.0. This is a two-file layout where a small descriptor file points
to a data-file. This format allows features such as multiple
snapshots.
Prerequisites for the vCenter Server Upgrade
Before you begin the upgrade to vCenter Server, make sure you have the vCenter Server system and the
database are properly prepared.
vCenter Server Prerequisites
The following items are prerequisites for completing the upgrade to vCenter Server:
n
VirtualCenter Server 2.x installed on a machine that supports vCenter Server 4.0.
n
VMware vCenter Server 4.0 installation media.
n
License keys for all purchased functionality.
If you do not currently have the license key, you can install in evaluation mode and use the vSphere Client
to enter the license key later.
vSphere Upgrade Guide
38 VMware, Inc.
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